FALL RIVER — City officials won’t be allowed to weigh in during the Massachusetts Gaming Commission meeting Thursday, but Mayor Will Flanagan and Kenneth Fiola, executive vice president of the Fall River Office of Economic Development, made their feelings known in letters regarding changes to rules for a commercial gaming license in the southeastern part of the state.

The Gaming Commission is set to vote on amending the schedule for application deadlines for a commercial gaming license in southeastern Massachusetts, known as Region C. The panel will also vote on whether to grant a waiver for the $500 million minimum investment requirement.

The meeting is scheduled for 10:30 a.m. at the Boston Convention and Exhibition Center at 415 Summer St. and will be streamed live from the commission’s website.

Flanagan said that, while he opposes any deadline change, he intends to use the extra time to work with Foxwoods Resort Casino and the investment group Crossroads Massachusetts LLC to create a better plan and continue to critique the project.

The commission decided on April 3 to delay the application deadline, set for July 23, to at least Sept. 23 to increase competition in the region.

Thursday’s vote on the deadline could potentially extend the application date.

In Flanagan’s letter, he states that arbitrary deadline changes could be detrimental to the casino project and that both the city and Foxwoods anticipated meeting the July 23 deadline.

Fiola, who said he will be in Boston for the Gaming Commission meeting, argued in his correspondence that extending the deadline further will only delay the investment of millions of development dollars into the region, delay the creation of much needed jobs and delay financial benefits in a region that is struggling to meet its public safety, educational and infrastructure obligations.

As he has expressed recently, Flanagan said he strongly opposes granting a requested waiver to decrease the $500 million minimum.

“It will greatly affect the economic impact and mean less jobs,” Flanagan said.

Foxwoods plans to invest $750 million in the project, which would be located on what is currently New Harbour Mall property. Foxwoods claims the casino would generate 2,000 jobs.

The city is currently negotiating a host-community agreement with Foxwoods that will be put before city voters before Foxwoods files an application with the Gaming Commission.